Reversing turbine



April 13, 1937. Y 1A. DAWES 2,076,621

' Y Y w `REVERSING TQRBINE Filed OG. l, 1936 l Fler, y

v INVENTOR JnMEs Fl. Unvlss.

ATTORNEY Patented pr. 13, 1937 Y,

UNITED STATES PATENT OFFICE 2,076,621 ,Y REVERSING TURBINE James A. Davies, Media, Pa., assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Penn- Sylvania Applioation `october 1, 1936, serial No. 103,475 4 claims. (c1. 60-95) My invention relates to marine turbines having absorb heat from'the idly-running blading and ahead and astern blading and it has for an object to give up the absorbed heat to the rcondensing perature in the ahead blading. the accompanying drawing, forming a part of The problem of excessive temperatures of idlythis appleatOn, in Which.' running turbine blading is encountered in the Fig. l is a longitudinal sectional View of a turmarine turbine art, this being due to friction of bine incorporating my improvement; and, l0 the blading in the stagnant vaporous and gaseous Fig. 2 is a transverse sectional View taken media; and, unless the heat so developed is dissialong the line II-II of Fig. 1. pated with sufcient rapidity, the blading and Referringto the drawing mOIevn detail, there surrounding parts of the turbine may attain exis shown ahead turbinev blading, at l0, and an l5 cessive temperatures. It has been observed that, astern blading, at Il, the blading being carried l5 Where the exhaust steam from an astern section by the casing or cylinder I2 and by the spindle is discharged so as to ow over the exhaust end I3, the ahead turbine blading being, for example, of the ahead blading on its Way to the condenser, 0f the double, or opposed, axial ow type supplied tures, the exhaust steam absorbing heat therehausting steam to the exhaust chambers l5 and 20 tions to spaced exhaust chambers, the astern the latter passes by the exhaust end 20 ofthe 25 astern; however, if there is no astern blading in ing therein, other means iS provided for Conveythe other exhaust chamber, then a stagnant ating heat developed in the idly-running section mosphere of vaporous and gaseous media exists 22 to the condenser circulating water. To this other section of the ahead blading may cause turbine casing I2 and into the exhaust chamber excessive rise of temperature in the latter, Ac- I6, the nOZZle providing a downwardly-directed cordingly, I propose to locate a steam nozzle in jet of high-velocity steam which is deiiected upexhaust end of the ahead blading and absorb condensing surface. Thus, it will be seen that A further object of my invention is to provide face I9 are so constructed and relatively arranged a marine turbine having ahead and astern bladas to provide a circulation chamber for the steam nozzle for supplying steam under high velocity tous ow referred to.

therein with the result that the friction of the end, a nozzle 25 extends tangentially through the 35 ing astern blading therein, the nozzle being arduce flow in a circuitous manner contiguously to 40 heat from Athe latter. the exhaust chamber I6 and the condensing sur- 45 i5 to the chamber for circulation in the latter to The nozzle 25 is preferably supplied with steam 55 from the auxiliary exhaust by means of a conduit 26 having a valve 21. The astern blading is supplied with steam by a conduit 2B having a valve 29. When the valve 29 is opened to render the astern blading operative, steam is also supplied to the nozzle 25 to induce circulation of steam in the exhaust chambersl and transfer 'off-heat by such steam from theidly-'running blading section 22 to the condensing surface i9, it being understood, as haust leaving the astern blading-is adequate to convey heat developed in the blading section'2l to the condensing surface. f Y f Y While I have rshown my form, that it is not so rious changes and modifications without ing from the spirit thereof, and I desire, therefore, that only such limitations shall beplac'xed` thereupon as are imposed by the prior art or as are specically set forthin the appended claims. i What l claim is; n

1...'Ihe combination with YaV turbine having ahead and astern'bladingand provided ,with separate exhaustchambers, of condensing means in` communication with said exhaust chambers and means i or conveying to the condensing means heat developed in thev ahead blading when rotated idly y, and including means for circulating steam contiguously to means. Y y

2. The combination with a turbine having ahead and astern blading and provided with separate exhaust chambers, of condensing vmeans in communication with said `exhaust chambers and means for conveying to the condensing means heat developed due to idle rotation of the ahead blading.when the turbine is operated astern and already pointed out, that the ex- Y invention it will be obvious to those -skiiledin the lart limitedbut is susceptible of va-V,` u

depart-l Y V,iaoentto.thel exhaust end of 1 and in'c'ontact with the condensing means.

the exhaust endof the ahead blading and in contactwith the condensing including means for 'circulating steam contiguously to the exhaust end of the ahead blading and in contact with the condensing means, and means for rendering said circulating means effective when the turbine is operated astern.

3. The vcombination with a. turbine having ahead and astern bladingland provided with separate exhaust chambers. of condensing means in chambers and :means effective when the turbine is operated astern foi` conveying heatv from the idly-running Ci'iheadblading to the condensing Ameans and in-` cludin'g a' nozzle extending tangentially into the;

exhaust chamber'oiv thefaheadV blading for discharging a "jetof'high-velocity'steaminto said:

chamber to provide for circulation of steam adthe ahead blading 4; .The combinationwith a turbine having double-flow blading including` sections exhausting steaminto terminal exhaust chambers and astern blading arranged means providing condensing surface in communication with said exhaust u conveying to the condensing surface heat developed by the idly-running ahead blading when the in temperature V.of the ahead blading, l named means comprising the arrangement of the, astern blading so as to exhaust steamk for flow contiguously to the exhaust end of rone of the sec tions of;- the ahead blading *and :then to the condensing surface and a nozzle for discharging high-velocity steam into Vthe other exhaust charnturbine is operated astern to prevent, excessive rise ber to Vinduce circulation of .steam contiguousy to the exhaust end of the other section of the ahead blading and in contact with the condensing surface. t

' JAMES A. DAV-IES.

chambers and means` for 

